不会做，参考别人答案

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#1 Created at ... [Delete] [Delete and Lock User]

def triangles():

l=[1]

while True:

yield l

l=[1]+[l[i]+l[i+1] for i in range(len(l)-1)]+[1]

#2 Created at ... [Delete] [Delete and Lock User]

NB你是怎么弄的算法。

#3 Created at ... [Delete] [Delete and Lock User]

使用列表生成式，确实简洁方便。